Valve mechanism.



No. 883,123. PATENTED MAR. 24, 1908. W. B. WADE. VALVE MECHANISM.

APPLICATION FILED APR. 6, 1907.

2 SHEETS-SHEET 1.

vwentoz Q/Vi m asses No. 883,128. PATENTED MAR. 24, 1908.

W. B. WADE. I

VALVE MECHANISM.

APPLIGATION FILED APR. 6, 1907.

2 SHEETS-SHEET 2.

IHW

UNITED STATES WILLIAM B. WADE, OF RIDGEWAY, VIRGINIA.

VALVE MECHANISM.

Specification of Letters Patent. I

Patented March 24, mos.

Application filed April 6, 1907. Serial No. 366,688.

To all whom ttmay concern:

Be it known that 1, WILLIAM B. WADE, a citizen of the United States,residing at Ridgeway, in the county of Henry and State of Virginia, haveinvented certain new and useful Improvements in a Valve Mechanism, ofwhich the following is a specification.

This invention is a valve-mechanism especially designed for afurnace-door opener of that kind comprisin a steam-cylinder, and apiston Working therein and operatively connected to the furnace-door.

The object of the invention is to provide a simple and reliable valvemechanism, together with means whereby such mechanism may be 0 erated bythe foot of the fireman in order t at his hands may be left free tohandle the shovel.

In the accompanying drawings, Fi ure 1 is a front elevation partly insection. l ig. 2 is a side elevation. 1 Fig. 3 is a section of the valvemechanism drawn to an enlarged scale.

Referring specifically to the drawings, 5 denotes the front of thelocomotive boiler, and 6 is the fire-door thereon having the usualknuckles 7 to which the pintle 8 is made fast, the latter working inlugs 9 on the furnace-door. The lower end of the pintle has a crank 10.

Below the furnace-door is a steam c linder 11 which is mounted on thefurnace ont in any suitable manner. A piston 12 works in the cylinderand'has a rod 13 which is connected by a rod 14 to the crank 10, bymeans of which the movement of the piston is made toirotate the pintle 8and thereby open or close the door i The valve mechanism for controllingthe movement of the piston 12 com rises a casing 15 which is mounted ont e furnacefront below the cylinder 11. The casing has a longitudinalport 16 open at both ends to receive exhaust pi ms 17. The valve re-'cei-ves steam from t e boiler through a pipe 18 which enters a port 19,extendingthrough the valve casing to the port 16. On opposite sides ofthe ort 19 are ports 20 and 21, respectively, which also extend throughthe valve casin to the port 16. The port 20 is connected y a ipe 22 toone end of the cylinder 11, and t e port 21 is connected by a ipe 23 tothe other end of said cylinder.

he valves are plugs which work in bores 24 1 extending across the ort16, and having transverseopenings a apted to be brought in linetherewith. One of suchvalves, indicated at 25, is located betweenth'eports 19 and 20, and another valve, indicatedat 26, is between the orts19 and 21.; Between the port 2 0 and the exhaust 17 is a valve 27, and

etween the port 21 and the exhaust is a valve 28. Thestems 29 of thevalves 25 and 27 are connected outside the valve casing by a crossbar30, and the stems 31 of the valves 26 and 28 are connected by across-bar 32.

The cross-bar 30 is connected to a lever 33 on one side of its fulcrum34, and the cross-bar 32 isconnected to said lever on the other side ofits fulcrum. To one end of the lever 33 is connected a spring 35 fordrawing said end down, and the other end of the lever is connected by alink 36 to a lever 37 pivoted at one end to the floor, and having attheother end a foot-pedal 38 which is normally held elevated by thespring 35.

The operation of the apparatus is as follows: In Fig. 1 the valves 28and 25 areo en, and the valves 26 and 27 are closed. ith the valves inthis osition steam enters the right-end of the cy'llnder'll through theports 19 and 16, valve 25, port 20 and pipe 22. The piston is .thusdriven toward theleft end of the cylinder from which the exhaust takesplace through the pipe 23, ports 21 and 16, valve 28 and exhaust pipe 17The movement of the piston toward the left end of the cylinder, byreason of its connection with the door, closes the same. The valves arenormally held in this position by the spring 35. To open thefurnace-door the foot is placed on the pedal 38 which tilts the lever33, causing its end to which the valves 25 and 27 are connected to rise,and the end to which the valves 28 and 26 are attached to lower, wherebythe position of the valves will be reversed, Steam then enters the'leftend of the cylinder through the ports 19 and 16, valve 26, ort 21 and(pipe 23, and the exhaust from t e right en of the cylinder is throughthe pipe 22, port 20, valve 27 and pipe 17. The piston then movesforwardly and opens the door. Upon removing the foot from the pedal, thelever 33 is restored to its normal position by the spring 35 whichreturns the valves to the position shown in Fig. 1, so tha'tsteam againenters the rig end ofthec linder and exhausts from the end, where thepiston is caused to travel toward the lift end of the cylinder and thedoor is closed. In orderthat the door may be held open without keepingthe foot on the cruni, and a3 connection between -thelever pedal a catch39 is provided for-holding the iand the otherpair of valves on theotherside same down; of its fulcrum, and means for operating the I claim Ilever. 5 The combination with a cylinder having In testimony-whereof Iaflixmy signature, 15

I ports at its ends, and a, piston working in the in presence of twowitnesses.

cylinder, of a pair of inlet and exhaust valves WILLIAM B. WADE. 4 forthe respective ends of the cylinder, 8; 'Witnesses:

lever, a connection between the lever and one W. D. MITCHELL,-

10 of said pair of valves on one side of its ful- I JNo. B. JONES.

